1. Leni & Peter W. May Department of Orthopaedics; Icahn School of Medicine at Mount Sinai; New York NY USA
2. Department of Orthopaedic Surgery; University of Tsukuba; Tsukuba Japan
3. Department of Orthopaedic Surgery; Brigham and Women's Hospital; Harvard Medical School; Boston MA USA
4. Department of Orthopaedic Surgery; Sidney Kimmel Medical College; Thomas Jefferson University; Philadelphia PA USA
5. Department of Orthopaedic Surgery; Hospital for Special Surgery; New York NY USA